First up is "Talking Toilet" from 1971.
Surprisingly, it's made in Japan. Most of this kind of product was coming from Hong Kong by the 1970's.
A hose connected to the box runs to a small compression bulb which is placed under the toilet seat. When the hapless victim sits down on the seat, the bulb forces air into the box which triggers the switch to begin playing. Inside is a tiny record (Remember those? Hey,this is 1970's technology, no sound chips!) that plays a few seconds of recording. You can listen here (if you dare).
Next up is a classic: the bending fork.
Setting on the table, it appears to be a normal fork. But when the intended victim picks it up to use: